condition	mean	min	max
4 h after light	5.995279999999999	5.85826	6.10711
8 h after light	5.9514933333333335	5.9005	5.98727
12 h after light	6.197080000000001	5.95363	6.3209800000000005
4 h after dark	6.3426800000000005	6.21424	6.47267
8 h after dark	6.279583333333333	6.11487	6.41542
12 h after dark	6.16894	5.8638	6.33214